Improvement in heel-cutting machines



itnittd tatet @sind @wie RICHARD C. LAMBART, 0F RAYNHAM, ASSIGNOR TO DAVIDWHITTEMORE,

0F NORTH BRIDGEWATER, MASSACHUSETTS.

Letters Patent No. 96,817, dated November 16, 1869.

IMPROVEMENT IN HEEL-CUTTING MACHINES'.

'.'lhe Schedule referred to in these Letters Patent and making paxt of the eamo.

To all whom tt may concern:

Be it known that I, RICHARD C. LAMBART, of Rayuham, in the State of Massachusetts, have invented certain new and useful Improvements in Heel- Cutting Machines; and I do hereby declare the following to be a full and correct description of the same, reference being had to the accompanying drawings, in which- Figure 1 represents a plan view of improvements for jacking the shoe, and cam for operating the knife, and a corresponding sectional view of the rocking-knife and its stock.

Figure 2 represents a plan view of the latter, and sectional view ofthe cani and jack improvements.

'lhcse improvements. have particular reference to a heel-cutting machine invented by me, and patented to David Whittemore, in Letters Patent, No. 76,207, dated March 31, 1868.

They consist- First, in the means for securing the shoe to the jack.

Secondly, in giving to the knife-stock an adjustmeut br changing the bevel of the heel.

Thirdly, in so. hanging the knife as to allow its edge a rocking motion to and from the Yheel, and in attaching to the jack a cam, which, as the jack turns, operates upon the knife, and causes the latter, at all times, to be presented atwise to the heel, and at such an angle as' will best facilitate thc proper cutting.

liolrrthly, in variousrdetails of construction, hereinafter "more particularly set forth.

In`the improved machine, the heel-pattern, marked A in the drawings, is attached to the jack in the same manuel' asin the patented machine above referred to. The toe-clamp, however, is omitted, and the shoe is secured to the pattern by a new device,' which I proceed to describe. p

The pattern is made with a detachable heel-plate, B, of the shape of the pattern, and having two pins, a a., as shown.

This plate has a lever or handle, c, as shown.

The part of the lever underneath the plate tits into a groove extending lengthwise a-longthe top ofthe pattern, thus fastening the plate to the pattern.

The plate is more firmly secured by the dowel-pin (I, shown in the groove ofthe pattern, and by another pin, e, extending from the lever down iu front of the v pattern.

The jack and pattern turn and slide as before.

'llhe pattern has rigidly attached toY it a cam, D,as

The cam is concentric with the pattern along the straighter .parts ofthe heel, but swells beyond thelatter at the top curve.

The knife-stock X is connected with the hand-lever, substantially as in the old machine, butto givev another adjustment to the knife, for' changing the bevel of the heel, the stock is attached to the intermediate slide by pins passing through the holes s andt. 'lhe pin passing through the hole s is the pivot. The other piu is furnished with a screw and nut, by means of which the'stoek is rigidly secured to the slide..

'lo allow the edge of the knife a'movement to and from the heel, the knife-stock is divided into two parts, as4 shown, the knife Ybeing attached to a rocking frame, X', within the stock, as shown. The guides a: and y, one running iu the rand of the shoe, and the other in contact with the edge of the pattern, belong to the rocking frame X', asA shown. The rocking fratrie is attached to the arms in m of the stock,'by two pivots I l, as shown.

The rocking knife-frame is furnished with a roller, R, against which the cam I) works as the jack tunis o1 slides. The roller is mounted upon a pin projecting ii'oin the frame, nearly on a line with the knife.

One arm, m, of the stock X, extends down in front of the roller, as seen in iig. 2, and serves as a stop to prevent the knife from cutting too deep into the heel.

In order that the roller 1t may be kept in `contact with the cam while the machine is in operation, the cani is made with a guide, s s, the cam and guide forming a cam-groove equal in breadth to the diameter of the roller, with the exception of the recesses e and e'.

The roller slips'int'o one of these recesses, when the spring connected with the hand-lever, as shown in the old machine, operates upon the slide to lift the knife yfrom contact with the' heel.

time, the whole of the end of the guide y is brought into contact with the pattern, which keeps the \knife' in a proper position to successfully operate, the jack turning s'o that less and less of the guide y remains in contact with thepattern. .lhe cam, swelling beyond knife B, for the purpose set forth, in the manner specified. v

4. The combination of the pattern, the guide y, the

cam, and the rocking knife, substantially as described.

5. Securing the knife-stock to the machine by means i ofthe hole s and slot t, to allow an adjustment for changing the bevel of the heel.

The above specification ofrmy said invention signed and witnessed at Boston, this 13th day of August, A. D. 1869.

RICHARD C. LAMBART.

Witnesses:

WILLIAM W. SWAN, CHAs. P. GOULY. 

